Activists have fronted court and pleaded guilty to charges relating to environmental protests last month.
A 69-year-old Launceston man was fined $100 and two others convicted of failing to comply with the direction of a police officer when they appeared in the Launceston Magistrates Court on Wednesday.
Magistrate Simon Brown adjourned proceedings in one case and discharged four others without conviction.
Mr Brown ordered that the defendants aged between 18 and 79-years-old pay court costs of $66.
The defendants, who all pleaded guilty, were charged after a World Environment Day protest in St John St, Launceston on June 5.
While organisers had permission to stay on the street until 1pm a number stayed on after 1pm and failed to move on despite the request of a police officer.
Outside the court a spokesperson said civil disobedience was used to bring attention to the extreme urgency of the climate situation, including the Canadian and Northern European heatwave and fires.
"Our generation will hold politicians accountable for their lack of action. Gas and coal are destroying our future. The youth of Australia overwhelmingly support strong climate action," one of the defendants Freya Maria Cooper, 18, said.
Rohan Thomas Swinsberg, 19, of Deloraine said Australia's record on climate action was appalling.
"No public funds should be spent on gas and other damaging fossil fuel projects. Instead, economic recovery funds should fund the creation of jobs that fast track solutions to the climate crisis and help communities recover," Mr Swinsberg said.
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